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Ants are among the most widespread and damaging of invasive alien species. Here, we report the complete mitochondrial genomes for two globally invasive ants: the Argentine ant Linepithema humile and the little fire ant Wasmannia auropunctata. The circular genomes of L. humile and W. auropunctata are 15,929 and 16,362 bp in length, respectively, and encode the same typical set of 37 mitochondrial genes (i.e. 13 PCGs, 22 tRNAs and two rRNAs) and one control region. The mitochondrial genome of W. auropunctata harbors a unique gene arrangement ('rrnS-trnV-CR-trnM-trnI-trnQ-nad2-trnW-trnC-trnY'; the underlines indicate inverted genes) between rrnL and cox1. Phylogenetic analysis largely corroborated the traditional taxonomy, except for L. humile which was found to be more related to those taxa of the subfamilies Formicinae and Myrmicinae than to the consubfamilial Leptomyrmex pallens. Our genomic data can be readily used for genetic assays of these two globally invasive ants.

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Anopheles mosquitoes are obligatory vectors for malaria, and their accurate identification is crucial for implementing biological control and malaria prevention. Mitochondrial DNA markers have proven powerful for such purposes. In this study, ten complete and two partial mitochondrial genomes were assembled for a total of 12 Anopheles mosquitoes. The ten complete genomes range in size from 15,322 to 15,458 bp, and the two partial genomes are 14,967 and 15,155 bp long, respectively. They all encode the same typical set of 37 mitochondrial genes (i.e. 13 PCGs, 22 tRNAs and two rRNAs) and one control region. Their genomic sizes, base compositions, codon usage, gene contents and organizations are mutually similar as well as similar to those of their congeners. Phylogenetic analysis suggested the placement of A. atroparvus and A. quadrimaculatus (both belonging to the subgenus Anopheles) within the major clade corresponding to the subgenus Cellia, which deserves further investigations.